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Router Global Commands
ldp-sync — Extends the LDP synchronization feature to a static route. When an interface comes
preference preference — The preference of this static route versus the routes from different sources
prefix-list prefix-list-name [all | none] — Specifies the prefix-list to be considered.
metric metric — The cost metric for the static route, expressed as a decimal integer. This value is
next-hop [ip-address | ip-int-name] — Specifies the directly connected next hop IP address used to
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back up, it is possible that a preferred static route using the interface as next-hop for a given
prefix is enabled before the LDP adjacency to the peer LSR comes up on this interface. In this
case, traffic on an SDP that uses the static route for the far-end address would be black-holed
until the LDP session comes up and the FECs exchanged.
This option when enabled delays the activation of the static route until the LDP session comes up
over the interface and the ldp-sync-timer configured on that interface has expired.
such as BGP or OSPF, expressed as a decimal integer. When modifing the preference of an
existing static route, the metric will not be changed unless specified.
Different protocols should not be configured with the same preference. If this occurs, the
tiebreaker is according to the default preference table defined in Table 5 on page 125
If multiple routes are learned with an identical preference using the same protocol, the lowest-
cost route is used. If multiple routes are learned with an identical preference using the same
protocol, and the costs (metrics) are equal, then the route to use is determined by the
configuration of the ecmp command
used when importing the static route into other protocols such as OSPF. When the metric is
configured as 0 then the metric configured in OSPF, default-import-metric, applies. When
modifying the metric of an existing static route, the preference will not change unless specified.
This value is also used to determine which static route to install in the forwarding table:
•
If there are multiple static routes with the same preference but different metrics then the
lower cost (metric) route will be installed.
•
If there are multiple static routes with equal preferences and metrics then ECMP rules
apply .
•
If there are multiple routes with different preferences then the lower preference route
will be installed.
Default
1
Values
0 — 65535
reach the destination. If the next hop is over an unnumbered interface or a point-to-point
interface, the ip-int-name of the unnumbered or point-to-point interface (on this node) can be
configured.
The next-hop keyword and the indirect or black-hole keywords are mutually exclusive. If an
identical command is entered (with the exception of either the indirect or black-hole
parameters), then this static route will be replaced with the newly entered command, and unless
specified, the respective defaults for preference and metric will be applied.
7750 SR OS Router Configuration Guide
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